So we rubberband the 18 together , right ? Then ship to topps in a padded mailer ?

separate your wrappers into lots of 18, then rubber band those together. if you're redeeming multiple boxes, they can all go in a box together, as long as they're separated. don't forget to put your address IN the envelope; I've heard it's unwise to rely on Topps to figure out your return address from the envelope.